Sense 2course, line -- (a connected series of events or actions or developments; "the government took a firm course"; "historians can only point out those lines for which evidence is available") => series -- (similar things placed in order or happening one after another; "they were investigating a series of bank robberies")

Sense 3course, trend -- (general line of orientation; "the river takes a southern course"; "the northeastern trend of the coast") => direction, way -- (a line leading to a place or point; "he looked the other direction"; "didn't know the way home")

Sense 4course, course of action -- (a mode of action; "if you persist in that course you will surely fail"; "once a nation is embarked on a course of action it becomes extremely difficult for any retraction to take place") => action -- (something done (usually as opposed to something said); "there were stories of murders and other unnatural actions")

Sense 5path, track, course -- (a line or route along which something travels or moves; "the hurricane demolished houses in its path"; "the track of an animal"; "the course of the river") => line -- (a spatial location defined by a real or imaginary unidimensional extent)

Sense 6class, form, grade, course -- (a body of students who are taught together; "early morning classes are always sleepy") => gathering, assemblage -- (a group of persons together in one place)

Sense 8course, row -- ((construction) a layer of masonry; "a course of bricks") => layer, bed -- (single thickness of usually some homogeneous substance; "slices of hard-boiled egg on a bed of spinach")

Sense 9course -- (facility consisting of a circumscribed area of land or water laid out for a sport; "the course had only nine holes"; "the course was less than a mile") => facility, installation -- (a building or place that provides a particular service or is used for a particular industry; "the assembly plant is an enormous facility")

Sense 2run, flow, feed, course -- (move along, of liquids; "Water flowed into the cave"; "the Missouri feeds into the Mississippi") => move -- (move so as to change position, perform a nontranslational motion; "He moved his hand slightly to the right")